ABB RER620 Product Manual - page 6
6
R E R6 20 A DVA NCED R ECLOSER PROTEC TION & CONTROL
Functionality
Other functions
Time delay off timers (8 timers)
•
Time delay on timers (8 timers)
•
Up/Down counters UDFCNT1...UDFCNT12 (12 counters)
•
Table 1. Supported functions RER620 (continued)
1) Three phase tripping is always enabled when ordering RER620. Single phase tripping is optional
2) Voltages connected to X[130] terminals 1 - 9 are considered as Source 1
3) Voltages connected to X[130] terminals 11 - 18 are considered as Source 2
4) Polarizing voltage is taken from X[130] terminals 1 - 9
5) UPS is mandatory when using RER620 with either ABB Gridshield or G&W Viper recloser
6) I0 is calculated
7) IG is measured from the fourth CT (X[120], terminal 13-14) input of RER620
3. Protection functions
This protection and control relay provides non-di-
rectional three and single phase as well as ground
overcurrent, phase unbalance and phase disconti-
nuity protections with optional sensitive earth
fault (SEF), high impedance fault detection (HIZ),
directional phase, ground and neutral overcurrent
and phase, ground (residual), positive sequence
and negative sequence undervoltage and overvolt-
age protection. Also, the relay offers three and sin-
gle-pole multishot autoreclose function for utility
overhead and underground distribution feeders.
Phase, ground and negative sequence protective el-
ements can be set by selecting any curve according
to the IEEE C37.112, IEC 60255-3. In addition, all tra-
ditional recloser curves are available.
Fast and delayed curves can be modified with the
following curve modifiers:
• Time multiplier – shifts curve vertically
• Minimum trip time – holds off curve tripping
• Time adder – add time to curve
For phase, ground and negative sequence protec-
tive elements, instantaneous overcurrent , defi-
nite-time overcurrent and high-current lockout are
also available.
RER620 offers different reset curves, including im-
mediate, definite time and inverse time setting op-
tions.
RER620 offers a dedicated phase and ground direc-
tional protective elements. Phase directional ele-
ments provide a variety of different polarizing
quantities such as Positive or Negative sequence
voltage, self-polarizing (faulted) or cross-polarizing
(healthy voltages). To secure a reliable and correct
directional operation in case of close short circuits
when polarizing quantity might be low, RER620 im-
plements a memory function.
In the case of failure in the secondary circuits be-
tween the voltage transformers and RER620 to
avoid misoperation of the voltage based functions,
RER620 includes a Fuse failure/Loss-of potential
functionality. Fuse failure/Loss-of potential func-
tionality can detect failure in one, two or three
phase failures in the secondary VT circuit.
Frequency protection including overfrequency, un-
derfrequency and frequency rate-of-change pro-
tection is offered in RER620 with standard configu-
ration. In addition, integrated load shedding and
restoration function based on frequency and
rate-of change is included. In the applications when
closing of breakers between asynchronous net-
works is needed, energizing and synchronizing
function is provided in the standard configuration.
In the application when high sensitivity is required,
positive and negative sequence directional power
elements are included in the standard configura-
tion. Recloser function in RER620 provides up to
five programmable auto-reclose shots which can
perform one to five successive auto-reclosings of
desired type and duration, for instance one high-
speed and one delayed auto-reclosing. Recloser
function has the ability to operate on three poles
independently. This feature allows it to be used in
distribution networks, where the bulks of loads are
single phase and it is not always necessary to oper-
ate all three poles in case of fault on one phase. Vi-
sual indication on programmable LED is provided
when recloser is in the lockout. By using program-
mable push button, reclosing functionality can be
disabled or enabled.
In several applications, such as fuse-saving applica-
tions involving down-stream fuses, tripping and
initiation of shot 1 should be fast (instantaneous or
short-time delayed). The tripping and initiation of
shots 2, 3 and definite tripping time should be de-